996691 has 4 divisors (see below), whose sum is σ = 998712. Its totient is φ = 994672.

The previous prime is 996689. The next prime is 996703. The reversal of 996691 is 196699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 996691 - 2¹ = 996689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (996601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276 + ... + 1438.

It is an arithmetic number, because the mean of its divisors is an integer number (249678).

2⁹⁹⁶⁶⁹¹ is an apocalyptic number.

996691 is a deficient number, since it is larger than the sum of its proper divisors (2021).

996691 is a wasteful number, since it uses less digits than its factorization.

996691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020.

The product of its digits is 26244, while the sum is 40.

The square root of 996691 is about 998.3441290457. The cubic root of 996691 is about 99.8895781150.

The spelling of 996691 in words is "nine hundred ninety-six thousand, six hundred ninety-one".